Added CallLogWrapper and SingleCallLog classes in selendroid-common-server utils.
These classes provide easier access to information from call logs retrieved from ReadCallLog handler.
These classes are also used to add call logs.

Addtionally, made some adjustments to pom files. Upgraded http-client from 4.2.1 to 4.3.2. This lack of upgrade
was causing Class not Found errors when attempting to test selendroid uisng the selendroid-test-app. Also added the
gson library to selendroid-server and selendroid-client to allow for the communication of CallLogWrapper and
SingleCallLog objects.